【題目】The scientist knows nothing about the matter, because he is always ______ himself in scientific study.

A. burying B. devoting C. focusing D. concentrating

【答案】A

【解析】

試題分析：A. bury埋葬；B. devote奉獻(xiàn)，致力于；C. focus集中；D. concentrate集中，全神貫注。句意：這個科學(xué)家對此事一無所知，因?yàn)樗偸锹裨诳茖W(xué)研究中。此處指潛心研究，故選A.

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